Doppler VOR

Doppler VOR

[′däp·lər ¦vē¦ō′är]
(navigation)
A ground-based navigational aid operating at very high frequency and using a wide-aperture radiation system to reduce azimuth errors caused by reflection from terrain and other obstacles; makes use of the Doppler principle to solve the problem of ambiguity that arises from the use of a radiation system with apertures that exceed one-half wavelength; the system is so designed that its signals may be received on the equipment used for the narrow-aperture VOR (very-high-frequency omnidirectional radio range).

Doppler VOR

Doppler VOR
A VOR (very high frequency omnidirectional radio-range), which by using Doppler principles reduces the errors in bearings caused by the reflection of RF (radio frequency) energy from objects near the ground. In the Doppler VOR system, the carrier is amplitude modulated by the reference signal and frequency modulated by the variable signal. In Standard VOR systems, the situation is reversed; the carrier is frequency modulated by the reference signal and amplitude modulated by the variable signal.
References in periodicals archive ?
Contract award: purchase and operational maintenance of doppler vor equipment.
The FAA has added a third Doppler VOR (very high frequency omnidirectional radio range) tower to its revamped air traffic control system at DFW.
5m for navaids which helped purchase one ILS, one doppler VOR and one NDB, all from Thomson
The ongoing projects / developments comprise replacement of complete CNS infrastructure including Nationwide Online connectivity, Controller Pilot Data Link Communication (CPDLC), Automatic Dependent Surveillance Contract and Broadcast (ADSC and ADSB), Instrument Landing Systems (ILS), Doppler VORs (DVORs), Distance Measuring Equipment and Digital Airport Terminal Information Systems.
Full browser ?